Silo-door.



J. H. MAYER.

SILO DOOR.

APPLICATION FILED 111,113.17, 1913.

Patented Aug. 11, 1914.

A TTORNEYfi THE NORRIS PETERS (0. PHUTO-LITHOH WASHINGTON. D.

n'nmnn swans arenas JOHN HENRY IVIAYEE, OF HUMBOLDT, IOWA, ASSIGNGB TOHUMBOLDT CEMENT PROD UC'IS MFG. (10., OF HUMBOLDT, IO'W'A, A CORPORATION()F IO'WA.

SILO-DOOR.

nice-nee.

Specification of Letters Iatent.

Patented An 11, 1914.

To all whom it may concern:

Be it known that 1, JOHN HENRY h lAYnR, a citizen of the United States,residing at Humboldt, in the county of Humboldt and fate of Iowa, haveinvented a certain new and useful Silo-Door, of which the following is aspecification.

The object of my invention is to provlde a simple and inexpensive doorfor silos made up of a number of independent sections arranged so thatby inovlng these sectlons downwardly to their closed positions they willbe drawn inwardly and held in close engagement against the door frameand against each other.

A further object is to provide a door for silos wherein the sectionsmay, by raising them a slight distance, be swung to a substantiallyhorizontal position to thereby provide a chute for use in emptying thesilo of its contents.

My invention consists in certain details, in the construction,arrangement and combination of the various parts of the device, wherebythe objects contemplated are attained. as hereinafter more fully setforth, pointed out in my claims and illustrated in the accompanyingdrawings, in wlnch:

Figure 1 shows an elevation of a portion of a silo provided with myimproved door. Fig. 2 shows a vertical, central, sectional view of asilo embodying my invention taken through the center of the door. Fig. 3shows a horizontal, sectional view of a portion of a silo with myimproved door fitted therein, and Fig. 4 shows a detail, sectional viewof a portion of a door frame illustrating the means employed by me forholding the door in closed position.

Referring now in detail to the accompanying drawings, 1 have used thereference numeral to indicate-a silo, 11 a door frame and 12' thehorizontal braces extending across the door opening. These are allbeveled upper and lower edges 16. Secured to each of the door sectionsnear its lower end is a pair of hooked-shaped arms 17, each comprisingan outwardly extend- 111g portion 18 rigidly secured to the door sectionand. a downwardly extending portion 19. The downwardly extending portion19 is preferably curved in an outward direction, as clearly shown inFig. 4, so that in moving the door section downwardly to its closedposition, the downwardly extendportion of said hook will engage theadjacent horizontal rod 12 and thereby draw the door section tightlyagainst the door frame. The relative positions of the door sections andslots are such that the lower end of each door section passes over onepair of the slots and terminates a slight distance below, while theupper end of the door section terminates immediately below the next slotabove. For convenience the door sections may be provided with suitablehandles 20.

In fitting the door sections into position in the door opening, they arefirst arranged across the opening with their edges engaging the insideedges of the cleats 13. In moving them to their closed positions theyare pushed downwardly along the door frame until the hooks on each ofsaid door sections engage the proper one of the horizontal braces 12. Onaccount of the shape of the portion 19 of each of the hooks the lowerends of the doorsections will be drawn tightly against the door frameand on account of the beveled upper and lower edges of each of the doorsections, the section immediately above any one of the other sectionswill draw the top portion of that section tightly against the doorframe. In this manner a relatively tight closure of the door openingwill be effected.

In emptying the silo of its contents each of the door sections may belifted upwardly a slight distance as the ensilage is removed from aroundit and when the lower edge of any one of the door sections is moved to aposition in line with the adjacent slots, the top of that door sectionmay be moved i11- wardly and the entire door section will then swing toa substantially horizontal position, as shown in dotted lines in Fig. 2.In this position the door section may be advantageously used as a chutein removing the contents of the silo. This arrangement when used inconnection with large silos will effect a considerable saving of laborin emptying the contents thereof.

I desire particularly to emphasize the advantages of the hooleshaped armemployed in my device, for by this means the doors are-clamped tightlyagainst the door frame and against each other and held in this position.

I claim as my invention:

1. In a device of the class described, a silo having a vertical dooropening, vertical frame members in said opening provided with aplurality of pairs of opposite slots inclined from the front edge of thedoor outwardly and downwardly, a plurality of door sect-ions designed tofill said door open-' ing, each of said sections being arranged to haveits lower ei'id-received in one pair of; said slots so that the door isinclined upwardly and inwardly from the opening to form a chute, andmeans for holding the door sections in their-last named positions. z. Ina device of the class described, a silo having a vertical door opening,vertical frame members in said opening provided with a plurality ofpairs ofropposite slots inclined from the front edge of the dooroutwardlyand downwardly, a plurality of door sections'designed to fillsaid door opening, each of said sections being arranged to have itslower end received in one pair of said slots so that the door isinclined upwardly and inwardly from the opening to form a chute, andmeans for holding said door sections in their closed and in their lastnamed positions.

3. In a device of the class described, a silo having a vertical dooropening provided with upright frame members at its sides, said framemembers being provided with a plurality of opposite pairs of slotsinclined from the front of the door frame downwardly and outwardly, ahorizontal rod connecting the upright members just above each of thepairs of slots, a plurality of door sections for closing said dooropening, inwardly extending hook members arranged 1 j on the lower partof each door section in a horizontal line, each-comprising a horizontalportion mounted in the door section and a downwardly and outwardlycurved portion formed on the inner end of the horizontal i Sopies ofthis patent may be obtained purposes stated. 7 V I n JOHN HENRY portion,said hook members being designed to extend over and engage the rods whenthe doors are in vertical, closed positiom s aid said doors in positioninclined upwardly and outwardly from the door opening, substan-tially asdescrlbed.

4. In a device of the class described, the comblnatlon of a sllo havinga vertical door opening therein, a frame'for said door opening providedat intervals withhorizontal rods and having a plurality of oppositelyarranged inclined slots formed in the parallel'faces thereof, to receivethe side edges of a door section, a-plurality of door sectionsarranged'in said opening with their vertical edges restingagainst theinside surface of said door frame, and hook-shaped arms on eachsectionnear the lower edge thereof for engaging said ho 'izontal rods tothereby hold sald-door sections in closed position, or

in position with the door edges received in V a pair of said slots.

5. In adevice of the class described, the combination-of a SllO havingavertical dooropenlng therein, a frame for sald door open-" ing providedat intervals with horizontal rodsand havin a plurality of oppositelyarranged slots f brmed in the parallel faces thereof, a plurality ofdoor sectionsxprovided with beveled upper and lower edges arranged insaldadoor frame, and hookshapecl arms on each of said door sections,

each comprising an outwardly extending POI'ilOIl rigidly secured to thelower portion of the doorsection, and a downwardly extending port-ioncurved outwardly to engage the adjacent horizontal-rod and draw saiddoorsection tightly against the door frame as the section is moveddownwardly, said oppositely arranged slots 1n the doorframe being sopositionedithat' by raising thedoor sections a slight distance upwardlythey a ,may be swung on said horizontal rods to a100 substantiallyhorizontal position, for the Witnesses :j Y

S. G. VVINNE, J, E. Banirnn. I

